Most IT professionals are keenly aware that IPv6 is the future. It has been for over a decade, as IPv4 addressing space has been running out of room.
While many proclaim the shortage is not as bad as it seems and that techniques such as subnet masking can help alleviate the upcoming shortage to some degree, at some point the move to IPv6 is inevitable.
Some operation within the confines of IPv4 is going to have to occur. In the grand scheme of things, there is simply too much network equipment out there to expect everything to have IPv6 capabilities yet. IT will have to decide whether to tunnel IPv4 devices to a backbone for IPv6 support or use dual IP.